single celled organisms and viruses chapter 1 review

11 terms by kbunt331

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plankton

small organisms that drift and float in water

microorganisms

tiny living things that can be seen only with a microscope

characteristics of living things

organization, order (complex structure), metabolism, growth, responsiveness, adaptation, regulation, reproduction.

bacteria

(microbiology) single-celled spherical or spiral or rod-shaped organisms lacking nuclei that reproduce by fission.

archaea

Unicellular microorganisms : . Like bacteria, archaea have no true nucleus; ., domain which consists of single-celled prokaryotes that have distinctive cell membranes and cell walls (Archaeabacteria)

protists

kingdom of one celled organisms with a nucleus

virus

package of nucleic acid wrapped in a protein coat that must use a host cell's machinery to reproduce itself

capsid

protein coat surrounding the nucleic acid of a virus

producers

organisms that make their own food

decomposers

eat dead organisms and recycle their nutrients back into the ground (bacteria and fungi)

parasite

an organism that lives on or in a host and causes harm to the host

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